Normalization of tumor markers and a clear resection margin affect progression-free survival of patients with unresectable pancreatic cancer who have undergone conversion surgery - Xiang Li; Xinyuan Liu; Na Lu; Yiwen Chen; Xiaochen Zhang; Chengxiang Guo; Wenbo Xiao; Xing Xue; Ke Sun; Meng Wang; Shunliang Gao; Yan Shen; et al. (BMC Cancer, 2023)